Question

Mary is building a sandcastle with rectangular prism molds. One mold is 4 inches long, 6 inches wide, and 2 inches tall. The other mold is 3 inches long, 5 inches wide, and 1 inch tall. If she creates a castle by stacking these molds on top of each other, what volume of sand will be contained in her castle?

Answer 1

The whole castle can hold 63 in² of sand.

Explanation:

First, find the volume of the first mold.

V = whl Substitute

V = (6)(2)(4) Multiply

V = 48 in²

Now, find the volume of the second mold.

V = whl Substitute

V = (5)(1)(3) Multiply

V = 15 in²

Add together both volumes to find the volume of the whole castle.

48 + 15 = 63 in²

Answer 2

63 cubic inches

Explanation:

You have to first find the volume of each mold:

6 × 4 × 2= 48 cubic inches

3 × 5 × 1= 15 cubic inches

Add these two volumes together to find the overall volume of the whole sand castle.

48+15= 63 cubic inches